To monitor the flow, nature, and concentration of pollutants discharged by any industrial user (IU), the federal pretreatment regulations require such IU to conduct self-monitoring and submit the findings to the City. This regulation is encoded in 40 CFR 403.12, Reporting Requirements for POTWs and Industrial Users.

Specific SMR forms are provided for each industrial user required to submit these reports. The forms contain applicable information on wastewater constituents that must be regulated and controlled to minimize the discharge of toxins and hazardous chemicals into the City of Los Angeles sewers. The forms consists of IU information, flow and sampling information, laboratory test results, production data, applicable Limits, certificates for TTO, cyanide and zero-discharge. IWMD generates a form for every sample point. If your Permit requires to submit such report the business must complete the form and forward the report to IWMD at the permit-specified frequency.